Yarn-guiding device for knitting-machines



s. WRIGHT & W. A. HERMON. YARN GUIDING DEVIUE FOR KNITTING MACHINES.

(Np Mpdel.)

Patented July 11, 1893.

WITNESSES v INYEN'I'DRE.

' m EEILEIIMIEIN WEIGHT,

is! A'I'EEDENEY.

UNi'rnn STAT-Es PATENT OFFICE.

SOLOMON WRIGHT AND WILLIAM A. HERMON, OF POWNAL, VERMONT.

YARN-GUIDING DEVICE FOR KNITTING-MACHINES.-

SPEGIFIOATION forming part of Letters Patent No. 501,128, dated July 11, 1893.

App ic i filed y 1892. Serial No. 438,868. (No model.)

To all whom it may concern:

Be it known that we, SOLOMON WRIGHT and WILLIAM A. HEBMON, citizens of the United States, residing at Pownal, in the county of Bennington and State of Vermont, have invented certain Improvements in Yarn-Guiding Devices for Knitting-Machines, of which the following, in connection with the accompanying drawing, is a specification.

This invention has reference to special means for guiding the yarn or thread from the spool or bobbin to the needles in cylinder knitting machines, but the same devices are capable of other applications.

In the present case the invention is shown as applied to an ordinary circular knitting frame in which spring needles are used which is employed in knitting a tubular fabric, and in which an extra thread is run in for the purpose of forming a fleece surface. The stands which carry the burr wheel for the regular thread, as well as the presser wheel, the knock-over wheel, &c., not shown as their construction and mode of operation are well understood.

In practice the burr wheel shown stands first in order with the other feeds in the introduction of its feed to the needles, and'the axis of the wheel is inclined so that the yarn is introduced from above and by the revolution of the burr wheel is drawn down under the barbs of the needles, from which point the. movement of the cylinder carries the needles along to the point where the regular feed is taken in. It has been found from experience that the old fashioned yarn guide consisting of a hole or eyelet in a plate or other piece of material often failed to hold the thread steadily and surely at the moment of its en-' gagement between the blades of the burr wheel and the needles, that the vibration often set up in the thread at this pointdue tothe rapid run of the yarn from the bobbin to the point of delivery over the blades of the burr wheel would cause it to jump out of the groove in the edges of the blades of the burr wheel, and in this way a loop of yarn would appear on the surface of the goods as a result of this defect. All this is obviated by this improvement.

The drawing fully illustrates the invention wherein the whole is shown in the single figure. 7

The needle cylinder is seen at A. This is equipped with the ordinary spring needles 0 with which the burr wheel H co-operates to feed in the extra thread designed to form the fleece finish. This wheel revolves on a stud which projects from the arm Gwhich in turn is adapted to slide in the socket F and its position is regulated by set screws connected with the rearend of a stem which passes through said socket. This socket is mounted on a stand D in the usual way. The axis of the burr wheel stud is inclined toward the right nWlllCh brings the blades in such a position that the yarn is fed in at a point near the top of the needles and as the burr revolves is carried down into .its proper position. To the top of the stand E is attached the device which embodies in the main the principle of our invention. It consists of a smooth rod J of suitable gage and length which may be adapted to the purpose and has its end nearest to the burr wheel slightly bent to prevent the thread flying overits end. For convenienceits rear end is doubled on itself as seen, although this is not an essential. It is attached to the stand E by a screw orbolt which passes th rough a coil in one end of it. The yarn is taken from the bobbin L up through a suitable guide or loop to the rod J. It is then wound around that rod two, three or more times, or at least until the convolutions afford-friction enough as the yarn passes around it to keep it taut from the point where it leaves the rod to where it takes the burr wheel. The effect of carrying the yarn several times spirally around a smooth rod as a means of reducing this peculiar vibration of the thread as it is delivered to the burr wheel is much superior to passing it th rough any foraminous guide however perfect. The stop motion with which this tension device is used consists of a ring T which surrounds the cylinder and is carried in stands, not shown, on which the arm S is mounted. This ring is connected with the belt shifter and is capable of being moved around the cylinder toalimited extent; Such movement effects the shifting of the belt in one direction and is automatically accomplished by the following means:-A supporting head N is mounted on a standard M to which the swinging arm R is attached by means of the pivoted piece Q. In the lower end of this piece Q the arm Z is fitted which is controlled in its position by the spring Y. This spring exerts its force to throw the end of the arm R toward the cloth at all times except when it is prevented by the arm U being swung into the position shown in full lines and there looked back by the drop wire WV and the pin X which projects from the rockshaft V. the drop wire is elevated so that its depending limb is held by one convolution of the thread or yarn as seen at a in the figure. If the yarn breaks the wire W drops by which movement the pin X is thrown out of engagement with the end of the arm U which being thus released nothing intervenes to prevent the spring Y from throwing the arm R around I so that its end will come against the cloth when by reason of the contact thus produced the cloth carries the arm around against the lVhen the yarn is running properly arm S of the belt shifting ring T and by giving it a forward push effects the stopping of the machine by shifting the beltin the usual way; hence We claim as our invention-- The combination with the burr wheel of a cylinder knitting machine and devices for supporting the same, of the described tension rod J having its end toward the burr wheel bent up substantially as shown, as and for the purposes described and set forth.

In testimony whereof we have hereto subscribed our names, at Pownal, in the county of Bennington and State of Vermont, this 30th day of June, A. D. 1892.

S. WRIGHT. W. A. HERMON.

Witnesses:

LIZZIE HERMON, MARY A. HERMON. 

